The **FIB-4 Score** was developed by Sterling et al. (2006) as a non-invasive method to assess liver fibrosis. It uses **age, AST, ALT, and platelet count** to differentiate between mild and advanced fibrosis. A score **< 1.45 suggests low risk**, while **> 3.25 indicates high risk** for significant fibrosis.

The **NAFLD Fibrosis Score (NFS)** was introduced by Angulo et al. (2007) to predict fibrosis in **nonalcoholic fatty liver disease (NAFLD)** patients. It incorporates **age, BMI, diabetes, AST/ALT ratio, platelet count, and albumin** to classify fibrosis risk.

The **AST/ALT Ratio** has been used to identify fibrosis, with values **≥ 1 suggesting advanced fibrosis**. The **BARD Score**, developed by Harrison et al. (2008), combines **BMI ≥ 28, AST/ALT ≥ 0.8, and diabetes** to predict fibrosis, where a score of **3 indicates high risk**.